Doweling jig

ABSTRACT

A Doweling Jig including a work piece clamping device having a pair of work engaging clamping jaws for clamping work pieces to be doweled together, and a drill guide mounted upon said clamping device for locating matched dowel holes to be drilled in said work pieces. The said drill guide being reversible upon said clamping device to locate said holes at identical predetermined distances measured from the opposite sides of said work pieces which are in contact with said jaws, without removing the doweling jig from the work pieces, by simply reversing the position of the drill guide upon said clamping device.

United States Patent 1 Kruse 1 111 3,708,237 1451 Jan. 2, 1973 [s41DOWELING .116

[76] Inventor: Stanley L. Kruae, R.F.D. No. 1, Box

248, Chaplin, Conn. 06235 221 Filed: July 26,1971

21 Appl. 196.; 165,486

[52] 11.5. CI. ..408/108, 408/109, 4081115 [51] Int. Cl. ..B23b 49/00[58] Field of Search ..408/109, 108, 115, 103, 241;

[56] References Cited UNITED STATES PATENTS 3,362,447 1/1968 Elder,.lr.,..408/109 3,273,426 9/1966 Cleveland ........408/ll5X 3,053,121 9/1962Proctor ..4os/1os Primary Examiner-Gil Weidenfeld Attorney-Louis V.Lucia s71v ABSTRACT A Doweling Jig including a work piece clampingdevice having a pair of work engaging clamping jaws for clamping workpieces to be doweled together, and a drill guide mounted upon saidclamping device for locating matched dowel holes to be drilled in saidwork pieces. The said drill guide being reversible upon said clampingdevice to locate said holes at identical predetermined distancesmeasured from the opposite sides of said work pieces which are incontact with said jaws, without removing the doweling jigfrom the workpieces, by simply reversing the position of the drill guide upon saidclamping device.

6 Claims, 6 Drawing Figures PATENTEDJAI 2 I975 INVENTOR. STANLEY L[Ow/5E ATTORNEY:

DOWELING JlG BACKGROUND OF THE INVENTION SUMMARY OF THE INVENTION Thepresent invention provides a simple doweling jig which measures thelocation of matched dowel holes in opposed work pieces from the oppositesides thereof,

whereby, when the said work pieces are doweledtogether, the surfaces onat least one side of the joined pieces are perfectly matched. Thegeneral purpose of the invention being to provide for locating dowelholes with maximum accuracy in work pieces which are to be doweledtogether.

BRIEF DESCRIPTION OF THE INVENTION FIG. I is a plan view in elevation ofa portion of a doweling jig embodying the present invention, showing apair of work pieces clamped together and the adjusted drill guide inposition for the drilling of a dowel hole in one of said work pieces.

FIG. 2 is a plan view of said doweling jig showing the adjusted drillguide in reversed position for the drilling of a matching dowel hole inthe other work piece.

FIG. 3 is an end view of said drill jig.

FIG. 4 is a sectional side view on line 4-4 of FIG. 3.

FIG. is a similar view of a modified form of the invention.

FIG. 6 is a sectional end view illustrating the matching of the doweledwork pieces.

DESCRIPTION OF THE INVENTION As shown in the drawings, my improveddoweling jig includes a clamping device comprising a plate portion 5having a stationary jaw portion 6 and a movable jaw 7 which is forcedinto clamping position by means of a clamping screw 8 threaded through arigid anchor por tion 9 depending from the plate portion 5.

The said portion 5 has parallel open ways 10 and 11 therein to receive aguide carriage 12 which includes a base 13- having an elongateddepending portion 14 which slidably fits within the ways 10 and 11. Saidbase '13 also hasan undercut slot 15 to slidably receive a drill guideholder 16 having the base 17 with a vertical post 18 thereon whichreceives a drill guide bushing 19, that extends vertically through abore in said post, and an elongated slot 20 in the base 13. Said bushingbeing interchangeable with bushings of other sizes and secured in saidpost by a set screw 21 and the saiddrill guide holder is secured inadjusted position in the slot 15 by a set'screw 22.

The base 13 has a locating pin 23 projecting downwardly therefrom andadapted to fit into pin receiving holes 24-24 in the stationary jaw 6,and 25-25 in the slidable jaw 7. g

In order to hold down the guide carriage 12 in adjustedposition withinthe ways 10 and 1 1, said carriage is provided with a pair of springbiased retaining jaws 2626 which are pivotally mounted upon studs 27 27and each have a prong 28 to engage the slots 29 in the plate portion 5;said jaws being each biased into holding position by a spring 30 whichis adjusted tensionwise by a nut 31 that is threaded to the stud 27;

In the use of my improved doweling jig for drilling dowel holes 3232,and 3333 in a pair of work pieces 34 and 35, whichare to be doweledtogether, the said work pieces are first clamped together in the correctposition, as shown. The proper bushing 19, for the drill to be used, isthen inserted into the post 18 and secured therein by the set screw 21.The drill guide carriage 12 is then placed in drill guiding'position byi n-' work piece 34, with the drill guide in the position shown inFIG.,1., the guide carriage is removed from' the way 10 by squeezingthejaws 2626, reversed, and again inserted in the way 10 and the pin 23inserted into the hole 24 in the movable jaw 7, as shown in FIGS. 2 and4.

When the holes 32-32 have been drilled in the work pieces 34 and 35, theguide carriage is removed from the way 10, with the holder 16 inadjusted position thereon, and inserted into the way 11 and the same.operation is repeated for drilling the holes 3333 in I said work pieces.Y

The receiving holes 24-24 and 2S25 are located in their respectiveclamping jaws 6 and 7 at'exactly' the same distances from the faces ofsaid jaws, which contact the opposite outer faces of the clamped workpieces 34 and 35, so that the location of the dowel holes is accuratelymeasured from said outer surfaces of the work pieces and therebyproviding a perfect matching of at least said outer sides when the workpieces are doweled together, regardless ofany difference in thethickness of said work pieces, as illustrated in FIG.6.

As shown in FIG. 5, my improved doweling jig rnay also be used fordrilling dowel holes in mitered workpieces 36 and 37 by providing alonger guide carriage 38 and an angled guide carrier 39, which'may beused exactly in the same manner as above described'for'the a movable jawslidable on said plate, portion and' a: screw anchored to said plateportion for'rnoving said movable jaw to clamp a workpiece between saidjaws,

a guidecarriage insertable into saidv way and having a guide memberthereon, said carriage being reversible in said way and having alocating projection engageable with reclining means on each .of saidclamping jaws at equal distances from the opposed surfaces of saidclamping jaws which are engageable with said work pieces for locatingsaid guide member at equal predetermined distances from the oppositesides of saidwork pieces engaged by said jaws.

and each of said jaws having a hole therein at equal distances fromtheir workpiece engaging surfaces to receive said guide locating pin andthereby locate said drill guide over said work pieces at equaldistancesfrom the surfaces thereof engaged by said jaws.

3. A doweling jig as set forth in claim 2 wherein said drill guide isadjustably mounted upon said carriage with relation to saidlocating'pin. I

4. A doweling jig as set forth in claim2 including a guide holderadjustably mounted upon said carriage, and a drill guide memberdetachably mounted in said holder.

5. A doweling jig as set forth in FIG. 2 including finger operatedhold-down means for detachablyretaining said carriage within said ways.

6. A doweling jig as set forth in claim 2 including slots'along saidways, and finger operable means engageable with said slots fordetachably retaining said carriage within said ways. i

1. A doweling jig including a plate portion having therein an open wayand a stationary clamping jaw and a movable jaw slidable on said plateportion and a screw anchored to said plate portion for moving saidmovable jaw to clamp a work piece between said jaws, a guide carriageinsertable into said way and having a guide member thereon, saidcarriage being reversible in said way and having a locating projectionengageable with reclining means on each of said clamping jaws at equaldistances from the opposed surfaces of said clamping jaws which areengageable with said work pieces for locating said guide member at equalpredetermined distances from the opposite sides of said work piecesengaged by said jaws.
 2. A doweling jig including a plate portion havingtherein a plurality of open parallel ways and thereunder a stationaryjaw portion, a movable jaw slidable on said plate portion and ananchoring portion, a screw threaded to said anchoring portion for movingsaid movable jaw to clamp together a pair of work pieces between saidjaws and crosswise to said ways, a guide carriage insertable in saidways and having thereon a drill guide and a guide locating pin dependingtherefrom, said carriage being reversable in said ways and each of saidjaws having a hole therein at equal distances from their work pieceengaging surfaces to receive said guide locating pin and thereby locatesaid drill guide over said work pieces at equal distances from thesurfaces thereof engaged by said jaws.
 3. A doweling jig as set forth inclaim 2 wherein said drill guide is adjustably mounted upon saidcarriage with relation to said locating pin.
 4. A doweling jig as setforth in claim 2 including a guide holder adjustably mounted upon saidcarriage, and a drill guide member detachably mounted in said holder. 5.A doweling jig as set forth in FIG. 2 including finger operatedhold-down means for detachably retaining said carriage within said ways.6. A doweling jig as set forth in claim 2 including slots along saidways, and finger operable means engageable with said slots fordetachably retaining said carriage within said ways.